<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header height="80px">
      <div>
        <img src="../assets/github.jpg" alt="" />
        <span>某某后台管理系统</span>
      </div>
      <el-button type="info" @click="logOut">退出</el-button>
    </el-header>

    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">
              |||
          </div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
        <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
              <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsobj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                    <!-- 图标 -->
                    <i class="el-icon-menu"></i>
                    <!-- 文本 -->
                    <span>{{subItem.authName}}</span>
                </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>

      <!-- 右侧主体内容 -->
      <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
    data() {
        return {
            // 左侧菜单数据
            menulist: [],
            iconsobj: {
                '125': 'iconfont icon-user',
                '103': 'iconfont icon-tijikongjian',
                '101': 'iconfont icon-shangpin',
                '102': 'iconfont icon-danju',
                '145': 'iconfont icon-baobiao'

            }, 
            // 是否折叠
            isCollapse: false,
            // 被激活的链接地址
            activePath: ''
        }
    },
    created() {
        this.getMenuList();
        this.activePath = window.sessionStorage.getItem('activePath');
    },
  methods: {
    logOut() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    // 获取所有的请求
    async getMenuList() {
        const {data: res} = await this.$http.get('menus');
        if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
        this.menulist = res.data;
    },
    // 点击按钮实现菜单栏的折叠与展开
    toggleCollapse() {
        this.isCollapse = !this.isCollapse;
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
        window.sessionStorage.setItem('activePath', activePath);
        this.activePath = activePath;
    }
  },
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #080808;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  font-size: 25px;
  color: #fff;
  div {
    img {
      margin-left: 12px;
    }
  }
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
      border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
    margin-right: 10px;
}
.toggle-button {
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
